These irresistible Chocolate Caramel Oat Bars (Carmelitas) feature a buttery oatmeal cookie base layered with rich chocolate chips and gooey caramel. The same crumbly oat mixture forms both the crust and topping, creating the perfect contrast to the melty filling. With their simple preparation and decadent taste, these bars make an impressive dessert for potlucks, bake sales, or anytime you need a sweet treat that combines the classic flavors of chocolate, caramel, and oats.